Planing-machine.



PATENTED MAR. 12, 1907.

W. HOLTHAUS.

, PLANING MACHINE. APPLICATION FILED NOV, 14, 1906.

111: NORRIS PETERS co., WASHINGTON, n c.

UNITED STATES PATENT OFFICE.

PLANlNG-IVIACHINE.

Specification of Letters Patent.

Patented March 12, 1907.

Application filed November 14,1906. Serial No. 343,452.

To all whom it may concern:

Be it known that-I, WILHELM HOLTHAUS, a subject of the German Emperor, and a resident of Mulheim-On-the-Ituhr, Germany, have invented certain new and useful Improvements in Planing-Machines, of which the following is a specification.

This invention relates to improvements in planing-machines, and more particularly to a device for decreasing or entirely silencing the buzzing noise caused by the planing-machines of all types when in operation.

The accompanying drawing shows, in Figures 1 and 2, the new or improved device embodying the invention as mounted on a planing-machine, in plan and elevation, respectively.

The lips or ledges 3 and 4, which are fixed on the inner adjacent ends of the beds 1 2 by screws, are wider than those hitherto used and are not plain, as are the latter, but provided with notches 5 and holes 6, the number of which depends on the width of the machine.

The planing-machines of all known types possess the drawback that they cause loud noise when in operation, which is not only inconvenient for the workshops themselves, but also for the whole neighborhood, who make, generally, serious complaints about it. In order to decrease this noise or to silence it entirely, the present invention is rovided. The buzzing noise is, as known, e ected by the atmospheric pressure caused by the quick rotation of the tool-shaft or of the cutting-tools themselves and which is not allowed to escape, owing to the lips or ledges being made too plain and also owing to the beds 1 2 being placed too near, but strikes against the blades of the lips or ledges, whereby the loud noise is caused. If,however, the lips or ledges are provided with notches and holes and are made wider, so that the beds 1 2 can be placed farther away from each other, the air can escape without being hindered, so that the noise is effectively avoided.

The device can be mounted on planingmachines of all types, as well as without much trouble on all already-existing machines.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is p In a planing-machine, a device for decreasing or entirely silencing the buzzing noise caused by the machine when in operation, comprising in combination, with the machine, the beds 1, 2 of the latter, lips or ledges 3, 4 fixed on the adjacent inner ends of said beds and made rather wide so as to allow of the beds being placed rather far away from each other, and provided with notches 5 and holes 6 for the purpose of preventing the air whirled up by the quick rotation of the machine from being compressed and thrown against the blades of the lips or ledges but to escape l'reely through said notches and holes, substantially as described and shown.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

WILHELM HOLTHAUS. Witnesses M. ENGELS,

ALFRED POHLMINGER. 

